What is the official height of a basketball hoop?

I keep seeing 8 ft hoops on ebay, but isn't that a bit low? i cant dunk full sized hoops and I'm 6 ft 2", so wouldn't i be able to dunk an 8 foot hoop?
Update: I keep seeing 8 ft hoops on ebay, but isn't that a bit low? i cant dunk full sized hoops and I'm 6 ft 2", so wouldn't i be able to dunk an 8 foot hoop?

BTW sorry i dunno how to pick best answer :(
Update 2: cant dunk YET, but thats probs cuz im a big tub of lard
7 answers 7